USB Direct ChargingNo longer spent money on battery. Both bicycle headlight and tail light are USB rechargeable and especially bike lights just remove the cap and insert to any USB output interface. A Free USB cord is also included in package. WATER RESISTANCE - Designed for all Whether Specially for Cyclists riding in urban environments. Drivers of oncoming traffic or other pedestrians will thank you for not blinding them. Also be be used for Hiking, Running, Walking, Camping, It weighs only 150 Grams, when performance matters. MULTIFUNCTION - Can be used as an emergency flashlight, keep it inside your car, basement, attic, and emergency kit. Use it when you're running, jogging, hiking, camping, walking your dog, cycling, changing a tire, night time family/kids activities, power outage and MORE Enjoy enhanced visibility and comfort knowing you will be safe and secure at any time of the day. GET YOURS TODAY!Easy Installation Unlike other cheap plastic bike lights holder with flimsy rubber mount, our bicycle light utilize integrated environmental silicone as strap to fix light. All installation can be finished by hand without any tools.